We present several early results from the Calar Alto program of near
infrared imaging and spectroscopy of the collision of Comet
Shoemaker--Levy~9 with Jupiter. Observations and timing of seven
separate impacts indicate that the precursors are ubiquitous and
associated with phenomena at or near the time of atmospheric
entry. The impact of the Q2 fragment was very unusual in having a
precursor brighter than the main event. Strong CO emission in K~band
spectra taken near maximum light of the H impact indicate temperatures
above 2000~K. Finally, monitoring of the disk of Jupiter in the seven
months since the collision show longitudinal spreading of the impact
structures at approximately 10 m~s$^{-1}$, with very little spreading
in latitude.
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